CN112672663A - Make-up tool and eyelash clip - Google Patents

Abstract

A resin cosmetic tool which can ensure strength without increasing its size as compared with a general metal shape and can perform the same operation as a metal cosmetic tool. A cosmetic prop (1) comprises a Young's modulus of 2500N/mm²～40000N/mm²And at least the maximum stress generation portion is formed to have a section modulus of 5mm³～40mm³。

Description

Make-up tool and eyelash clip

Technical Field

The disclosure relates to a make-up prop and an eyelash clip.

Background

Generally, an eyelash clip (eyelash curler ) is a structure using the principle of lever, and is formed of metal such as stainless steel using 2 fingers.

However, in a general metal eyelash curler using the principle of leverage, 1 metal rod is twisted at a grip portion and formed into a ring shape, and 2 metal rods extend side by side at other portions, so that the metal section is thin at the grip portion and the holding property is poor. In addition, metal-allergic people cannot use them.

Therefore, in order to prevent metal allergy or to make the skin soft, eyelash clips have been proposed in which a portion corresponding to a grip portion in contact with a finger, a contact surface in contact with an eyelid, or the like is partially covered with a resin or partially made of a resin from above a metal as a portion in contact with the skin (for example, patent documents 1 and 2).

There is also an eyelash curler having a spring as an eyelash curler which is made of resin on the entire outer side without using metal on the outer side (for example, patent document 3).

< Prior Art document >

< patent document >

Patent document 1: japanese Utility model application laid-open No. Sho 59-40002

Patent document 2: japanese laid-open patent publication No. 2007-68695

Patent document 3: japanese patent laid-open publication No. 2004-57581

Disclosure of Invention

< problems to be solved by the present invention >

However, if a resin portion is attached to a part of a metallic eyelash curler or a part of the metallic eyelash curler is replaced with a resin portion as in patent document 1 or 2, the number of manufacturing steps for assembly is increased as compared with a metallic eyelash curler alone, and productivity is accordingly lowered.

Further, if a resin-made eyelash curler is to be made in the same shape as a general metal-made eyelash curler, strength for clipping is insufficient, so that the entire outside resin-made eyelash curler shown in patent document 3 has a spring for clipping, is a complicated and large-sized structure, and has a dissimilar appearance and a different operation method than a general metal-made eyelash curler using a lever.

In view of the above circumstances, an object of the present invention is to provide a resin cosmetic tool which can ensure strength without increasing its size as compared with a general metal shape and can perform the same operation as that of a metal.

< means for solving the problems >

In order to solve the above problems, in one embodiment of the present invention, there is provided a cosmetic tool made of a material having a Young's modulus of 2500N/mm²～40000N/mm²And at least the maximum stress generation portion is formed to have a section modulus of 5mm³～40mm³。

< effects of the invention >

According to one embodiment, the cosmetic tool made of resin can ensure strength without increasing its size compared with a general metallic shape, and can be handled in the same manner as a metallic cosmetic tool.

Drawings

Fig. 1 is an overall view of an eyelash clip according to embodiment 1 of the present invention.

Fig. 2 is an exploded view of the eyelash clip of fig. 1.

Fig. 3 is a view of a metallic eyelash curler of a comparative example.

Fig. 4 is a view for explaining a fulcrum and a load point in the case of approximating the eyelash clip to an overhanging simple beam configuration.

Fig. 5 is an explanatory diagram of an example of a cross-sectional shape of a beam constituting a fixing member and a force point member as a force receiving portion, and an example of a width (depth) (x) and a height (y) of the cross section.

Fig. 6 is a measurement result of measuring a eyelash curly pressure applied by a person when a metal eyelash curler is used by a hand-type measuring instrument.

Fig. 7 is a determination table comparing eyelash curlers made of SUS and 6PA + GF 55% resin.

Fig. 8 is a determination table in which the section modulus is changed by changing the width x and the height y of the beam using 6PA + GF 55% resin as a material.

Fig. 9 is a table showing the determination results for each section coefficient for each material.

FIG. 10 is a graph showing a recommended range of the material of the present invention defined by the section modulus and Young's modulus.

Fig. 11 is a view showing a section modulus of each part of an example of the resin-made eyelash curler according to embodiment 1.

Fig. 12 is a diagram showing analysis conditions for the eyelash clip 1 composed of 6PA + GF 55% resin.

Fig. 13 is a graph showing the distribution of stress when the eyelash curler 1 of fig. 11, which is composed of 6PA + GF 55% resin, is analyzed under the 2 nd analysis condition.

Fig. 14 is a graph showing the distribution of deformation amounts when the eyelash curler 1 of fig. 11, which is composed of 6PA + GF 55% resin, is analyzed under the 2 nd analysis condition.

Fig. 15 is a graph showing section factors of respective parts of the eyelash curler 9 made of metal according to the comparative example.

Fig. 16 is a table showing the curling pressure when the metallic eyelash curler 9 is in contact with the hand-held portion of the eyelash curler 1 of fig. 11 made of 6PA + GF 55% resin.

Fig. 17 is a view showing the load position of the hand-held measuring mechanism and the 1 st measuring device for measuring the gripping force and the nipping pressure by applying a gradually changing load by the device.

Fig. 18 is a graph showing a comparison of measurement results when the gripping force of the eyelash clip 1 of fig. 11 and the metal eyelash clip 9, which are made of 6PA + GF 55% resin, are measured in the measurement environment shown in fig. 17.

Fig. 19 is a graph showing a comparison of measurement results when the curl pressure of the eyelash clip 1 and the metal eyelash clip 9 of fig. 11, which are made of 6PA + GF 55% resin, is measured in the measurement environment shown in fig. 17.

Fig. 20 is a measurement result of a eyelash curler pressure applied by a person when the eyelash curler 1 of fig. 11 composed of 6PA + GF 55% resin was used by a hand-made measuring instrument.

Fig. 21 is a measurement result of measuring a eyelash curly pressure applied by a person using the metal eyelash curler 9 using the sensor sheet.

Fig. 22 is a measurement result of measuring a eyelash curler pressure applied by a person using the eyelash curler 1 of fig. 11 composed of 6PA + GF 65% resin using a sensor sheet.

Fig. 23 is a configuration view of an eyelash clip 2 according to embodiment 2 of the present invention.

Fig. 24 is an exploded view of the eyelash clip 2 of fig. 23.

Fig. 25 is a view showing an example of the size of the eyelash clip 2 of embodiment 2.

Fig. 26 is a view showing the load position of the measuring mechanism and the 2 nd measuring device based on the sensor sheet for measuring the gripping force and the nipping pressure by applying a gradually changing load by the device.

Fig. 27 is a measurement result of the gripping force (load) applied to the load points of the hand-held portion of the 4 types of eyelash curlers made of metal, according to embodiment 1 made of 6PA + GF 55% resin, embodiment 2 made of 6PA + GF 55% resin, and embodiment 2 made of PAMXD6+ GF 50% resin, in the measurement environment shown in fig. 26.

Fig. 28 shows the measurement results of the pinching pressure of 4 types of eyelash curlers of embodiment 1 made of 6PA + GF 55% resin, embodiment 2 made of 6PA + GF 55% resin, and embodiment 2 made of PAMXD6+ GF 50% resin, which are made of metal, in the measurement environment shown in fig. 26.

Fig. 29 is a conversion table of measurement conditions.

Fig. 30 is a view showing an example of a resin partial eyelash curler according to an example of the present invention.

Fig. 31 is a view showing a resin eyelash curler according to another embodiment of the present invention.

Fig. 32 is a view showing an example of a resin cosmetic forceps having the section modulus and young's modulus shown in fig. 10.

Fig. 33 is a view showing an example of resin-made pair of cosmetic scissors having the section modulus and young's modulus shown in fig. 10.

Detailed Description

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Hereinafter, the same components are denoted by the same reference numerals in the drawings, and redundant description thereof may be omitted.

The present invention relates to a resin-made makeup tool, such as an eyelash clip (eyelash clip for eyelash full-area use and eyelash clip for local use), tweezers, and scissors for beauty.

< embodiment 1 >

Fig. 1 is an overall view of an eyelash clip according to embodiment 1 of the present invention as an example of a makeup tool. Fig. 2 is an exploded view of the eyelash clip of fig. 1.

The eyelash curler 1 of the present embodiment is similar in structure to a general eyelash curler made of metal, and is integrally formed with a resin described below.

The eyelash curler 1 has a fixing member 10, a force point member 20, and an acting member 30.

The fixing member (support portion) 10 has an upper pressing portion 11, leg portions 12A, 12B, leg portions 13A, 13B, an arm 14, and a hand-held portion 16. The arm 14 is formed with an engagement hole 15.

The upper pressing portion (abutting member, upper clip, frame) 11 is a portion that abuts the upper surface of the upper eyelash when curling the upper eyelash.

The support portions 12A and 12B are integrally connected to each other from both ends in the width direction of the upper pressing portion 11, and extend in the vertical direction. The upper ends of the branch column parts 13A, 13B are connected to the lower ends of the column parts 12A, 12B, the lower intervals thereof are narrowed in a V-shape, and the lower ends thereof are connected to the arm 14. The column sections 12A, 12B and the branch column sections 13A, 13B function as columns.

The arm portion (1 st arm portion) 14 is an extension portion connecting the upper pressing portion 11 and the hand-held portion 16. In this example, the arm 14 extends in the same direction as the inner portion of the hand-held portion 16.

The grip portion (handle, finger ring, grip) 16 is in the shape of a ring formed with a finger hole for a finger to enter. When the user curls the eyelashes by himself, the thumb of the user is inserted into the finger hole of the hand-held portion 16. Alternatively, when eyelash is curled by a cosmetic stylist such as a makeup stylist, an index finger, a middle finger, or a ring finger of the cosmetic stylist is inserted into the hand-held portion 16. The inner peripheral portion of the hand-held portion serves as a finger hook portion.

In the present invention, the fixing member 10 is integrally formed with a hand-held portion 16, an arm 14 extending in the vertical direction, a pair of support columns 12A, 13A, 12B, 13B branched into 2 from the arm 14 and supporting both end portions of the upper pressing portion 11, and the upper pressing portion 11.

Here, as shown in fig. 1, the arm 14 extends from the fulcrum to the hand-held portion 16 by one, and the width (depth) and height (thickness) of the hand-held portion 16 are the same as those of the arm 14.

Small holes 151A and 151B penetrating in the width direction are formed in side surfaces on both sides of the engagement hole 15 formed in the arm 14.

The force point member 20 has arm portions 21 and 24 and a hand portion 25. The arm 21 on the tip side is formed with a 1 st engagement hole (tip side engagement hole) 22 and a 2 nd engagement hole 23. The extending portions (arm portions, 2 nd arm) 21, 24 have a front end side arm 21 and a rear end side arm 24, the front end side arm 21 extends from the front end portion beyond the connection portion, and the rear end side arm 24 extends in the same direction as the inner portion of the hand-held portion 25, unlike the front end side arm.

The distal end side arm 21 of the force point member 20 is inserted into the engagement hole 15 of the fixing member 10 from the end portion on the distal end side opposite to the grip portion 25, and is locked by the pin shaft PS2 so as to pass through the 2 nd engagement hole 23 and the small holes 151A and 151B in a state where the 2 nd engagement hole 23 coincides with the small holes 151A and 151B on the side surface of the engagement hole 15.

By this engagement, the force point member 20 can rotate with respect to the fixed member 10 about the pin shaft PS2 as a rotation axis.

When the force point member 20 is rotated with respect to the fixing member 10, the arm 14 of the fixing member 10 and the arm portions 21 and 24 of the force point member 20 shown in fig. 2 are in a stress generating range. The stress generation range includes a maximum stress generation portion where the stress is maximum. The stress generation range refers to a region where a large stress is generated, and the stress is generated in other portions. Details of the maximum stress generation portion will be described below together with fig. 13.

The hand-held portion (handle, finger ring, grip portion) 25 is formed in a ring shape with a finger hole for a finger to enter. When the user curls the eyelashes by himself, the index, middle or ring finger of the user is inserted into the finger hole of the hand-held portion 25. Alternatively, when the eyelashes are curled by the dresser, the thumb of the dresser is inserted into the hand-held portion 25. The inner peripheral edge of the finger hole of the grip portion 25 is defined, and a portion extending substantially in the same line from the arm portion 24 serves as a finger hook portion, which serves as a load point C when the hand is actually moved in a sandwiched manner (see fig. 4).

The force point member 20 is integrally formed with a hand-held portion 25 and an extended arm portion 24, and the arm portions 21 and 24 are formed of one piece at the force point member 20 and have the same thickness as the hand-held portion 25.

The action member (interlocking part, lifting part) 30 has a lower pressing part 31, link parts 32A, 32B, and a connecting part 33.

When curling the upper eyelashes, the eyelash clip 1 is held in the state shown in fig. 1, and the lower pressing portion (lower abutting member, pressing piece) 31 pushes up the lower surface of the eyelashes sandwiched between the upper pressing portion 11 from the lower side, so that the upper eyelashes are curled upward.

In addition, when curling the lower eyelashes, the eyelash clip 1 is grasped upside down from fig. 1, and the lower pressing portion 31 pushes down the upper surface of the eyelashes sandwiched between the upper pressing portion 11 from the upper side, so that the lower eyelashes are curled downward.

The upper ends of the link portions (lifting/lowering pillars) 32A and 32B are connected to the lower pressurizing portion, and are inclined in a substantially V-shape, and the lower ends are connected to the connecting portion 33.

The connection portion 33 has a three-dimensional U-shape (コ -shape). Small holes 331A and 331B penetrating in the width direction are formed in the side surfaces on both sides forming the coupling portion 33.

The tip of the tip-side arm 21 of the force point member 20 is inserted into the U-shaped inside of the coupling portion 33 of the acting member 30, and is locked by the pin shaft PS1 so as to pass through the tip-side engagement hole 22 and the small holes 331A and 332B in a state where the tip-side engagement hole 22 coincides with the small holes 331A and 332B on the side surface of the coupling portion 33.

By this engagement, when the force point member 20 rotates about the pin shaft PS1 as a rotation axis, the acting member 30 can be lifted and lowered together with the pin shaft PS 1.

Further, engaging hooks (engaging portions) 311A and 311B having a substantially circular shape (hook shape) and partially missing are provided at both left and right ends of the lower pressing portion 31. The engagement hooks 311A and 311B are engaged with the pair of support columns 12A and 12B, and are thereby slidable along the support columns 12A and 12B of the fixing member 10.

In use, a jig rubber R (see fig. 17 a) as an elastic member is inserted into a groove formed in the upper surface of the lower pressing portion 31.

With this configuration, when the hand-held portion 25 on the one end side is moved so as to approach the hand-held portion 16, the force point member 20 pivots about the pin shaft PS2, which is the coupling portion between the 2 nd engaging hole 23 and the small holes 151A and 151B, as a fulcrum (fulcrum B), so that the tip-side engaging hole 22 coupled to the coupling portion 33 of the action member 30 on the other end side moves up and down in the direction opposite to the movement of the hand-held portion 25, and the action member 30 is pushed up together with the pin shaft PS 1.

Thus, the operation member 30 is moved up and down in accordance with the front-end-side engagement hole 22 by moving the hand-held portion 25, and the lower pressing portion 31 is moved up and down while the engagement hooks 311A and 311B slide along the support posts 12A and 12B of the fixing member 10.

The force point member 20 rotates about a part of the fixing member 10 as a fulcrum, and moves the acting member 30 up and down.

The eyelash is curled by the lower pressing portion 31 of the acting member 30 approaching the upper pressing portion 11 of the fixing member 10 and applying pressure (curling) to the eyelash between the elastic member (the clip rubber R) and the upper pressing portion 11.

In the eyelash clip 1, the fixing member 10, the force point member 20, and the acting member 30 are integrally formed of resin, and details of the resin to be formed will be described later.

In the present embodiment, the connection portion between the force point member 20 and the acting member 30 and the connection portion between the fixed member 10 and the force point member 20 are rotatably fixed by the pins (PS1, PS2) serving as connection shafts for connecting the members, and the materials constituting the pins PS1, PS1 may be any materials such as resin or metal.

When the pins PS1 and PS2 are made of resin, all the components constituting the eyelash curler 1 are made of resin, and thus, metal can be completely eliminated.

< comparative example >

Fig. 3 is a view of a metallic eyelash curler 9 of a comparative example. The eyelash curler 9 shown in fig. 3 is an example of a general eyelash curler made of metal.

The following description deals with differences between the metallic eyelash curler 9 and the construction of the eyelash curler 1 of the present invention shown in fig. 1.

In the metallic eyelash curler 9 shown in fig. 3, the fixing member 70 is formed with an upper pressing portion (metal frame) 11 and a thin metal rod, and then they are bonded. The force point component 80 is formed by transforming a thin metal rod. The working member 90 is formed by forming a lower pressing portion (metal frame) 91 and a frame of a thin metal rod, and then bonding them.

Specifically, in the fixing member 70, the metal rod is processed to be twisted into a ring shape at the lower end thereof to form the grip portion 76, and longitudinal slit holes are formed in advance in the opposite portions at both end portions corresponding to the support posts 72A, 72B on the upper side of the metal rod. At this time, the lower end is twisted into a ring shape, and 2 thin metal rods (741, 742) are arranged in a state of contacting or approaching each other at an arm 74 as an extension portion from the column portions 72A, 73A, 72B, 73B to the front of the hand-held portion 76. Then, the metal frame is inserted into the cutout holes of the inner surfaces of the distal ends of the parallel stays 72A and 72B as metal rods and welded, whereby the upper pressing portion 71 and the parallel stays 72A and 72B are coupled.

In the force point member 80, a hand-held portion 85 is formed by twisting the lower end thereof into a ring shape, and 2 thin metal rods (811, 812), (841, 842) are arranged in contact with each other at arm portions 81, 84 as extensions from the hand-held portion 85 to the tip.

In the action member 90, the end portion of a metal rod formed by bending 1 metal into a substantially V shape is welded to the lower pressing portion 91 as a metal frame, and thereby the link portions 92A and 92B are connected to the lower pressing portion 91.

In the action member 90, when the substantially V-shaped apexes of the link portions 92A and 92B are coupled to the force point member 80, the upper ends of the link portions 92A and 92B are welded to the lower pressurizing portion 91 in a state where the link portions 92A and 92B are bent and formed in the shape of a thin metal rod in a state where the thin metal rod is inserted into the distal end engagement hole 82 of the force point member 80. In this way, the forming of the acting member 90 and the coupling of the acting member 90 and the force point member 80 are performed simultaneously, and therefore, the acting member 90 and the force point member 80 do not separate after the manufacturing.

In this configuration, since the hand-held portions 76 and 85 forming the loop in the fixing member 70 and the force point member 80 have a fineness corresponding to 1 arm with respect to the arms 74, (81, and 84) gathered into 2 arms, the cross-sectional cylinders are thin in the hand-held portions 76 and 85, and the holding performance is poor.

In contrast, the eyelash clip 1 of the present invention shown in fig. 1 is made of resin, and therefore, in the fixing member 10 and the force point member 20, the arms 14(21, 24) are made of one piece and are the same in thickness as the hand-held portion.

In the configuration of the present invention, the cross-sectional shape of the hand-held portions 16, 25 in the fixing member 10 and the force point member 20 is made the same size as the arm portions 14, 21, 24, so that the hand-held portions 16, 25 can be thickened to improve the holding property, and the force can be sufficiently applied without being caught by the fingers and without pain even if the force is applied.

Here, the present inventors studied the way of applying force in a metallic eyelash clip in order to verify the strength of a resin eyelash clip, and conducted experiments.

< study of shape (approximation of overhanging simply-supported Beam) >)

As a premise, since the eyelash curler has a complicated shape, the shape calculation is performed instead of a simple shape.

Fig. 4 is a diagram approximately illustrating the manner of application of force in the eyelash clip. In fig. 4, the upper view shows positions of a fulcrum and a load point in the eyelash clip, and the lower view shows the fulcrum and the load point of the eyelash clip are approximated to an overhanging simple beam (one-side concentrated load).

At the moment of clipping eyelash, the rotating portion of eyelash clip, that is, the force point member 20 is considered to be restricted from rotating and hardly rotating and moving, and therefore, the connecting portion of eyelash clip can be replaced with the fulcrum A, B.

The load point C is set as the hand-held portion 25 of the force point member 20, and the load P is set as the force (gripping force) applied from the fingers to the eyelash curler.

Here, when the fixing member 10 and the force point member 20 function as a "beam" of an overhanging simple beam and a load or action is considered, as shown in fig. 5, the width (depth) (x) and the height (thickness) (y) of the cross section of the beam including the force receiving portion, that is, the fixing member 10 and the force point member 20 are considered.

Fig. 5 is an explanatory diagram of the width (depth) (x) and height (y) of a cross section of an example of a beam constituting the force receiving portion, that is, the fixing member and the force point member. The structure of the beam having a square cross section shown in fig. 5 is an example, and the cross-sectional shapes of the fixing member 10 and the force point member 20 are not limited to the rectangular shape shown in fig. 5, and may be other shapes such as a circular shape, an elliptical shape, and a semicircular shape.

In the formula of "overhanging simple beam (single-side concentrated load)" shown in fig. 4, the bending moment MB generated around the fulcrum B is the largest.

Therefore, the present inventors performed (see fig. 6 to 14) selection of a resin by performing a simulation based on a conventional metallic eyelash curler when an external force (load P) is applied to an eyelash curler as an object.

[ examination of gripping force and crimping pressure ]

((Experimental example 1))

In order to secure the strength of the resin-made eyelash curler, an experiment for examining the curling pressure (clip pressure) when the metal-made eyelash curler 9 of the comparative example shown in fig. 3 is used was performed as a premise.

In this experiment, the eyelash curls 9 shown in fig. 3 were used by a plurality of subjects in the same manner as in the normal use, and the curling pressure was measured. As the metal eyelash curler, a general eyelash curler made of stainless steel is used.

In this experiment, the pressure at the time of use of the metallic eyelash curler, that is, the curling pressure was measured for 6 subjects. At this time, a manual measuring mechanism in which a pressure sensor R (see fig. 14) is provided directly below the clip rubber R provided on the lower pressing portion 91 as a portion for pinching eyelashes is used to measure the pinching pressure, which is the pressure for pinching the eyelashes. The pinching pressure is measured by a self-made pressure sensor, and therefore is not set as an index.

Fig. 6 shows the measurement results of the eyelash curly pressure when the metallic eyelash curler 9 is used, which is measured by the manual measuring means. In the graphs of (a) to (f) of fig. 6, the ordinate represents the nip pressure, and the abscissa represents the time (unit: sec). The 6 subjects were 20-50 male and female, and designated as character a, character B, character C, character D, character E, and character F.

Here, as shown in fig. 6, the maximum values of the pinching pressure are 328.26, 498.34, 380.67, 318.58, 238.9, 257.33, respectively.

Therefore, the maximum value of the curling pressure of the resin-made eyelash curler described below was set to the target value with a slight margin from the maximum value 498.34 in the above experiment, and the experiment was performed.

(pressure corresponding to target value)

Further, as described above, the pressure applied to the clamp rubber R by the actual subject can be measured as the pinching pressure, and the numerical value is examined in order to convert the pinching pressure generated by the human power, which is the force applied to the hand-held portions 16 and 25, into the pressure (N) that can be applied to the hand-held portion as the load (external force) by a machine or the like.

First, the load P at the time of the curl pressure 500 in the metallic eyelash curler 1 is measured by a tester and a hand-held pressure sensor (see fig. 17(a)) and derived values are 10N for each hand-held portion. Specifically, since the gripping force, which is the load applied to the hand-held portion, is 17N to 21N (see the solid line in fig. 18) before and after the pinching pressure is 500 (see the solid line in fig. 19), 20N, which is a substantially central value, is divided into half in each of the hand-held portions 16 and 25, and 10N is obtained.

Note that, using P as 10N, the bending moment MB generated around the fulcrum B in the above-described "overhanging simple beam (single-side concentrated load)" is expressed by the following formula.

MB ═ P (load) × b (length)

This time, in the following structural examples, according to

a＝12mm

b＝50mm，

The MB is 10(N) × 50 is 500N · mm.

The following materials were selected and the following durability test was performed, taking into account the load 10N of the hand grip as a load value at which the curling effect can be expected.

< selection of materials >

((Experimental example 2))

The present inventors have comprehensively determined the width (x) and the height (y) of the beam as the fixing member 10 and the force point member 20 based on the mechanical strength determination and the formability determination. At this time, the load of 10N calculated as described above was applied to both the hand-held portions as an external force (gripping force).

Fig. 7 shows a determination table comparing eyelash curlers made of SUS and 6PA + GF 55% resin.

The metal eyelash curler 9 is usually made of stainless steel (SUS304) in many cases. The 6PA + GF 55% resin eyelash clip 1 of fig. 7 is shaped to mimic a typical stainless steel eyelash clip.

Here, Young's modulus (N/mm)²) The constant of proportionality of strain to stress in the coaxial direction, and the longitudinal elastic modulus are shown. Section modulus Z (mm)³) The index is an index indicating the cross-sectional performance of the member, specifically, the strength and the resistance to bending.

The judgment under each condition in fig. 7 and 8 is performed according to the following criteria.

And (3) judging the mechanical strength: when the stress value generated in the material during use is equal to or less than the strength of the material itself, the determination can be made by ensuring the rigidity in response to the force.

And (3) determining formability: it is judged whether or not a defect has not occurred at the time of molding.

Comprehensive judgment: the mechanical strength and moldability were comprehensively evaluated.

These determinations are simulated determinations based on CAE (Computer Aided Engineering) operations, except for the configurations of the metallic eyelash curler 1 and the 6PA + GF 55% resin eyelash curler 1, in which the section factor is 4.5.

As shown in the table of fig. 6, when a load of 10N is applied to each of the grips 16 and 25 by the metal eyelash curler 9 made of a general stainless steel (SUS304), the tensile strength (strength) is sufficiently high and the deflection amount is small even if the width x or the height y of the beam including the fixing member 10 and the force point member 20 is as small as 2.75mm, and therefore, all the determinations are passed.

In contrast, in a resin eyelash curler, for example, PA (polyamide) + GF (glass fiber) 55, in which the width x and height y of the beams 10 and 20 are 3mm close to those of metal, all the determinations are x (NG) because the amount of deflection is large.

The inventors also performed the same simulation determination as in fig. 7 for the case where the width and height of the beam portion (fixed member 10, force point member 20) were gradually changed for PA + GF 55% resin.

Fig. 8 is a determination table in which the cross-sectional coefficient is changed by changing the width x and the height y of the beam using 6PA + GF 55% resin as a material. Fig. 8 shows the results of evaluation of eyelashes made of PA + GF 55% resin, with the dimensions (width and height) of the beam varied.

As shown in fig. 8, even when the resin composition is PA + GF 55%, the width x or the height y of the beams 10 and 20 is increased, whereby the determination of "o" (pass) can be made.

From the results obtained by calculating the above-mentioned FIG. 8, it is considered that the Young's modulus is 2500 to 40000 (N) in consideration of the formability depending on the thickness in the injection molding and the workability in the use of the eyelash curler/mm²) The cross-sectional area coefficient is preferably 5 to 40 (mm)³). The reason for this will be explained below.

Fig. 9 shows the evaluation results when a mascara clip is formed using a plurality of materials and used, and fig. 10 shows the recommended range of the material of the present invention defined by the section modulus and the young's modulus.

Specifically, fig. 9 shows that SUS304 (stainless steel) and Polyamide (PA) which are materials having predetermined cross-sectional areas and cross-sectional coefficients, a fiber reinforced resin obtained by adding 55% of Glass Fiber (GF) to PA, nylon 6/10, polyether ether ketone (PEEK), polybutylene terephthalate (PBT), GF polyamide MXD6, and CF polyamide MXD6 are formed to have cross-sectional coefficients of 7.5 to 32 (mm) in the range³) The eyelash curler of the size of (1) and the evaluation results in use.

The polyamide MXD6 is a crystalline thermoplastic polymer obtained from m-xylylenediamine (MXDA) and adipic acid, and commercially available Reny (registered trademark) 1022H obtained by blending 50% of Glass Fiber (GF) in polyamide MXD6 is used as the glass-reinforced polyamide MXD (PAMXD6+ GF50) used herein. As the carbon-reinforced polyamide MXD6, commercially available RenyC408 prepared by blending 40% of Carbon Fiber (CF) with polyamide MXD6 was used.

The strength was evaluated by changing the section area of "PA + GF 55%" as a fiber-reinforced resin and changing the section coefficient. The cross-sectional area is increased to improve the cross-sectional coefficient, and the position on the graph of fig. 10 is moved upward, so that the evaluation is improved even for the same material. For example, in the case of a material of "PA + GF 55%" and having a section modulus of 4.5 (mm)³) In the case of (2), the strength was not satisfied and the total was judged as "X", and the section modulus was 15.05 (mm)³) The case (2) and the section modulus were 36 (mm)³) In the case of (2), the strength is satisfied and the overall judgment is good.

In addition, regarding PBT, the cross-sectional area is increased (even if the cross-sectional coefficient is 32 (mm) similarly to "PA + GF 55%"³) Nor does it satisfy the strength evaluation.

In FIG. 10, the portion surrounded by four sides is formed by a moldA recommended range to be set. The recommended range is that the Young modulus is 2500-40000 (N/mm)²) The material (2) and has a section modulus of 5 to 40 (mm)³)。

In this range, the larger the young's modulus of the resin is, the smaller the section modulus can be. That is, even if the young's modulus of the resin is increased, the resin becomes thinner and closer to a metal product, and the strength can be secured. Considering the operability of the user, the section modulus is preferably 30 (mm)³) Hereinafter, the section modulus is more preferably 20 (mm)³) The following.

On the other hand, even in the case of a resin having a small young's modulus and being brittle, if the section modulus is increased, the strength may be satisfied by simulation, but in consideration of the workability, the upper limit of the section modulus is set to 40 (mm) without excessively increasing the section area³)。

Therefore, in order to increase the strength of the material including the resin without increasing the sectional area and fall within the recommended range of fig. 10, the material constituting the eyelash clip is preferably formed of a fiber-reinforced resin in which Glass Fibers (GF) are blended into the resin. For example, when glass fibers are added to a resin having the same section modulus, the young's modulus increases, and the position on the graph of fig. 10 moves in the right direction. In addition, CF (carbon fiber) may be mixed in addition to or instead of the glass fiber. For example, the fiber-reinforced resin is preferably prepared by blending 30 to 65 mass% of Glass Fiber (GF) or Carbon Fiber (CF).

By adding GF or CF, the rigidity can be enhanced against deformation or fracture of the resin material itself (for example, PA). Typical values for young's modulus are PA: 1200 to 2900MPa, for example, the Young's modulus can be increased (for example, 4725MPa) by adding glass fiber. Therefore, the eyelash clipping pressure close to the metal can be obtained.

The resin to be mixed with the glass fiber is not particularly limited as long as it is a resin capable of blending the fiber. Examples of the resin include Polyamide (PA) (including various nylons), polyether ether ketone (PEEK), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyamide MXD6, and the like.

As examples of the young's modulus of the resin not shown in fig. 9, the young's modulus of PEEK is about 3900MPa, the young's modulus of glass fiber reinforced PEEK is about 6300MPa, the young's modulus of PET is about 2800 to 4200MPa, the young's modulus of glass fiber reinforced PET is about 9000 to 9900MPa, the young's modulus of PETG and glass reinforced PETG is slightly larger than that of PET and glass reinforced PET, PPS is about 3300 MPa, and the young's modulus of glass fiber reinforced PPS is about 3900 MPa. The young's modulus of the glass fiber reinforced resin varies depending on the blending ratio of the glass fibers.

The resin having a strong strength among the resin monomers, for example, the monomer of the special polyamide MXD6, had 5000 (N/mm) even without being reinforced with glass fiber or carbon²) In the case of the Young's modulus, the section modulus is 5 to 40 (mm) as long as the intensity can be compensated by simulation³) Any thickness within the range of (1) can be adopted as the material of the eyelash clip of the present invention.

In addition, even if not a special resin, the Young's modulus of the resin is 2500 (N/mm)²) As described above, even if nylon 6/10, PA, PEEK, PET, PETG, PPS, or the like is used, the eyelash curler can be formed as a single body without mixing glass fibers by setting the section modulus to be large within the above recommended range. In this case, it is estimated that the Young's modulus of the resin monomers other than nylon 6/10 is 2500 (N/mm)²)～5000(N/mm²) Therefore, if the section modulus is set to be slightly deviated from the lower end of the recommended range, for example, 10 (mm) at the time of molding³) As described above, even if the resin is a single body, a specific strength can be achieved, and the material of the eyelash curler of the present invention can be used.

Here, it is preferable that the stress generation range in the fixing member 10 and the force point member 20 directly receiving the force of the user's finger satisfies the young's modulus and the section modulus within the recommended range, and the section modulus may be smaller than the recommended range if the young's modulus within the recommended range is satisfied with the sections of the link portions 32A and 32B of the acting member 30 that indirectly receives the force to perform the elevating operation.

Here, the PA + GF 55% was examined, and when the reinforcing resin (glass fiber) constituting the eyelash curler was formed using PA + GF 65% in which the content of the glass fiber was increased, the strength could be further increased.

The present inventors also analyzed the stress and the amount of deformation of the eyelash curler of embodiment 1 having a specific size, using an example of the material included in the numerical range of the selected material.

< embodiment 1 and analysis >)

((Experimental example 3))

The present inventors formed the eyelash curler of embodiment 1 having the size shown in fig. 11 as a size capable of securing strength by cae (computer Aided engineering), and performed analysis and measurement experiments.

Fig. 11 is a view showing a section modulus of each part in an example of the resin-made eyelash curler 1 according to embodiment 1.

The eyelash curler 1 used in the analysis or experiment described below is formed in the following dimensions as shown in fig. 11. This size corresponds to a size calculated by CAE as a size capable of securing strength.

In this configuration, the following section coefficients are set.

The section modulus Z of the fixing member 10 is 14.98mm³

The section factor Z of the force point element 20 on the hand-held portion side is 14.98mm³

The section modulus Z of the tip end side of the force point member 20 is 10.92mm³

The section modulus Z of the support part of the acting component C is 1.57mm³

In addition, if the portion sandwiched between the fulcrum a and the fulcrum B is made too thick in the force point member 20, there is a possibility that the operability is deteriorated when the distal end portion of the distal end side arm 21 moves when the force point member rotates, and in the force point member 20, as shown in fig. 4, the displacement amount on the hand grip portion 25 side is large, and therefore, it is desirable that the rear end side is made thick. Therefore, as described above, the thickness of the distal end side arm 21 of the force point member 20 is set to 2 steps.

The section coefficient is calculated on the premise of a rectangular shape, but the section may be a circle, a hexagon, or the like.

Fig. 12 is a diagram showing analysis conditions for the eyelash clip 1 composed of 6PA + GF 55% resin.

As shown in fig. 12, both ends of the upper pressing portion 11, which is the upper end of the fixing member 10, are fixed to XYZ axes, and the hinge portion (fulcrum B), which is the intersection of the fixing member 10 and the force point member 20, is fixed in a friction-free state.

As the load, a force of 25N +25N is applied to the hand portions 16, 25. The load 25N on the hand-held portions 16 and 25 corresponds to the gripping force 50N. In this experiment, the load of 25N +25N applied to the hand-held portions 16 and 25 was a load (load) larger than that in normal use.

Using these analysis conditions, the present inventors performed CAE analysis on the stress and deformation amount in the eyelash curler 1 of fig. 11.

Fig. 13 is a graph showing the distribution of stress when the eyelash curler 1 of fig. 11, which is composed of 6PA + GF 55% resin, is analyzed under the 2 nd analysis condition.

As shown in fig. 13, the stress is not contradictory to the structure of the overhanging simple beam (one-side concentrated load) shown in fig. 4, and the maximum stress is generated in the vicinity of the fulcrum B, which is the connection portion between the fixed member 10 and the force point member 20. In this configuration, since the height (y) of the force point member 20 changes with the fulcrum B interposed therebetween, a large stress is generated in the vicinity of the fulcrum B on the tip end side where the height becomes short. The maximum stress generation position in the fixing member 10 and the force point member 20 is within the stress generation range shown in fig. 2, that is, within the range of the arm 14 and the arm portions 21 and 24.

Fig. 13 shows an example in which a larger load than in normal use is applied to apply a stress of 163.6MPa to the periphery of the fulcrum B of the distal end side arm 21 of the force point member 20, and the same applies to a portion where the stress is easily applied in normal use.

Fig. 14 is a graph showing the distribution of deformation amounts when the eyelash curler 1 composed of 6PA + GF 55% resin is analyzed under the 1 st analysis condition.

In this experiment, the amount of movement of the hand-held portion, that is, the amount of displacement was not specified, but it was found that the inner sides of the hand-held portions 16 and 25 did not contact each other even when 25N of mechanical pressure was applied to each of the hand-held portions 16 and 25 on both sides with respect to the amount of deformation shown in fig. 14.

((Experimental example 4))

The present inventors also performed a comparative experiment in which the metallic eyelash curler 9 shown in fig. 3 and the resin eyelash curler 1 shown in fig. 11 were pressed in until the hand-held portions 16 and 26 come into contact with each other, and the curling pressure was measured.

Therefore, the size of the metallic eyelash clip 9 for comparison is shown in fig. 15. Fig. 15 is a view showing an example of the size of the metallic eyelash curler 9 of the comparative example shown in fig. 3.

The section modulus of each portion is as follows.

The section coefficients Z of the fixing member 10 and the force point member 20 are 2mm³

The section modulus Z of the acting member 30 is 0.33mm³

Fig. 16 shows the measurement result of the pinching pressure when the hand-held portions come into contact with each other. In this experiment, as shown in fig. 17(a), a pressure sensor 210 was provided directly below the clamp rubber R to measure the pinching pressure.

The amount of displacement (amount of movement) before the opposing surfaces of the hand-held portions 16, 25(76, 85) come into contact differs depending on the size of each eyelash clip. In comparison with the metal eyelash clip 9, the resin eyelash clip 1 has a displacement amount corresponding to a displacement amount of a portion of the hand-held portions 16 and 25 which is touched by a finger on an inner peripheral side of the finger hole, and therefore, if the beam is made thicker, the displacement amount is slightly increased.

In the following experiment, the metallic eyelash clip 9 of the comparative example was made of SUS304 stainless steel and the size example of fig. 15 was used. In this experiment, the eyelash clip 1, the size of which is measured in fig. 18 and 19 and which is shown in fig. 11, is made of 6PA + GF 55% resin.

As shown in fig. 16, when the hand-held portions of the metal eyelash curler 9 are displaced by 23mm, the curling pressure is 750. When the hand-held portions of the mascara clip 1 of fig. 11 made of resin are displaced by 23mm, the clip pressure at this time is 744.

The pinching pressure in the state where the hand-held portions are in contact with each other corresponds to the maximum pinching pressure. As can be seen from fig. 16, in the resin-made eyelash clip 1 having the size of fig. 11, the maximum clip pressure is 744 close to that of the metal. Therefore, the eyelash curler 1 of fig. 11 can achieve the maximum curling pressure equivalent to that of the metal.

((Experimental example 5))

The present inventors measured the gripping force and the curling pressure of the resin-made eyelash curler 1 having the size shown in fig. 11 and the metal-made eyelash curler 9 having the size shown in fig. 15.

Fig. 17 is a view showing the load position of the hand-held measuring mechanism and the 1 st measuring device for measuring the gripping force and the nipping pressure by applying a gradually changing load by the device. Fig. 17 shows (a) a measuring mechanism (hand-held pressure sensor) for measuring the curl pressure and (b) a position at which the eyelash curler is fixed by the 1 st testing machine and a load position at which a load is applied.

In the measurement environment 1, the testing machine is fixed to the eyelash curlers 1 and 9 with the hand-held portion 16 on the lower side as shown in fig. 17(b), and a load is applied from the upper side, that is, from the outer side of the hand-held portion 25.

In addition, when the pinching pressure (fig. 19) is measured, the pressure sensor 210 connected to the circuit board 220 is provided directly below the clip rubber R of the groove portion of the lower pressing portion 31 shown in fig. 17(a) for pinching eyelashes of the eyelash clips 1(9), and in this state, a load is applied to the position shown in fig. 17(b), whereby the upper pressing portion 11 is lowered. At this time, when a load that changes in load position is applied as shown in fig. 17(b), the pressure (sandwiching pressure) with which the lower pressing portion 31 is pressed by the upper pressing portion 11 and the clamp rubber R is measured by a manual pressure measurement mechanism for storing the measurement value of the pressure sensor 210 in the circuit board 220.

The pressure sensor 210 shown in fig. 17(a) is used in the same manner as in fig. 6 in which the pinching by the human hand is measured. In this way, the pressure sensor 210 is provided just below the clip rubber R, and the clipping pressure, which is the clipping pressure of the eyelashes, is measured.

Fig. 18 and 19 show measurement results of the resin-made eyelash curler 1 and the metal-made eyelash curler 9 of fig. 11 according to embodiment 1, measured in the measurement environment shown in fig. 17. Fig. 18 shows a comparison of grip forces, and fig. 19 shows a comparison of crimp pressures.

As shown in fig. 18, the gripping force required for the same displacement amount is substantially equal between the metal eyelash curler 9 and the resin eyelash curler 1. That is, the eyelash curler 1 is easily deformed as compared with the metallic eyelash curler 9 of the comparative example.

Further, according to fig. 19, when the gripping force is applied so as to have the same displacement amount, the curling pressure of the resin eyelash curler 1 is substantially equal to the curling pressure of the metal eyelash curler 9.

Through this experiment, the eyelash curler 1 having the maximum curling pressure of 700 or more as shown in fig. 16 was used, and the amount of displacement during use was set to 14mm as the amount of displacement of about 500 which was the target value of the curling pressure during actual use as shown in fig. 19. In detail, in the eyelash clip 1, since the pinching pressure at the time of use (pinching pressure at the time of use < maximum pinching pressure) can be made smaller than the pinching pressure (maximum pinching pressure: 744) at the time of displacement to the position where the hand-held portions 16, 25 contact each other in fig. 16, it is not necessary to make the hand-held portions 16, 25 contact each other at the time of use.

Therefore, in the eyelash curler 1 according to embodiment 1, the curling pressure can be set to a deformation amount with respect to the maximum curling pressure during use with a margin, and the stress generated in the component can be reduced.

By selecting a resin material and adjusting the section modulus in this manner, even if the resin material is made, the same curling pressure as the metal eyelash curler of the comparative example can be achieved, and the gripping force for achieving the curling pressure can be made closer to that of the metal material.

((Experimental example 6))

The present inventors performed an eyelash curling experiment on a subject using the resin-made eyelash curler 1. In this experiment, the pressure at the time of use of the resin eyelash curler 1, that is, the curling pressure was measured for 3 subjects.

Fig. 20 shows the measurement results of the eyelash curler pressure of the resin eyelash curler 1 measured by a hand-type measuring instrument.

In fig. 20, the horizontal axis represents time, and the vertical axis represents the nip pressure. In this experiment, as in fig. 6, a pressure sensor was provided directly below the rubber of the eyelash curler that curls the eyelashes, and the curling pressure, which is the eyelash curling pressure, was measured.

Note that fig. 20(a) is the same person as person a shown in fig. 6(a), fig. 20(B) is the same person as person B shown in fig. 6(B), and fig. 20(C) is the same person as person C shown in fig. 6 (C).

As can be seen by comparing fig. 6 and 20, the resin-made eyelash curler 1 of any one person can achieve a curling pressure equal to or higher than that of the metal-made eyelash curler 9 of fig. 6. Therefore, the eyelash clip 1 can curl eyelash while performing fine adjustment in substantially the same usage as the metal eyelash clip 9 and with the same force application method.

((Experimental example 7))

In addition, an experiment was performed to examine the curling pressure when using the eyelash curler 1 of the size of fig. 11 of the embodiment 1 and the metallic eyelash curler 9 of the comparative example shown in fig. 15 by using different devices.

In this experiment, the metal eyelash curler 9 having the size shown in fig. 15 was used for 6 subjects, and the curling pressure, which is the pressure during use, was measured by the sensor sheet 410 shown in fig. 26(a) described below, in the same manner as in the normal use. At this time, a sensor piece 410 connectable to an information processing device 430 such as a personal computer is inserted directly below a clip rubber R provided above the lower pressing portion 91 as a portion for clipping eyelashes, and a clipping pressure, which is a pressure for clipping eyelashes, is measured.

Fig. 21 shows the measurement result of the eyelash curler pressure applied by a person when the metal eyelash curler 9 is used, which is measured by the sensor sheet 410. In the graphs of (a) to (f) of fig. 21, the ordinate represents the nip pressure, and the abscissa represents the time (unit: sec). The 6 subjects were different from persons a to F described above, and were designated as person G, person H, person I, person J, person K, and person L.

As can be seen from fig. 21, any one subject equally divides several eyelash curls. Further, the entire time or number of times required to curl eyelashes, the time for each pinching, and the like vary among individuals.

As shown in FIG. 21, the maximum values of the pinching pressure of each person are 0.27, 0.16, 0.29, 0.21, 0.14, and 0.19 (N: Newton).

((Experimental example 8))

Fig. 22 shows the measurement result of the eyelash curler pressure applied by a person when the eyelash curler 1 of embodiment 1 composed of 6PA + GF 65% resin is used by the sensor sheet 410.

In fig. 22, the horizontal axis represents time, and the vertical axis represents the nip pressure. In this experiment, as in fig. 21, the sensor piece 410 was inserted just below the clip rubber R of the eyelash clip 1 that clips the eyelashes, and the clipping pressure, that is, the clipping pressure, was measured.

In fig. 22, the characters G, H, I, J, K, and L shown in (a) to (f) of fig. 21 are the same characters, respectively.

Here, as shown in FIG. 22, the maximum values of the pinching pressure of each person are 0.26, 023, 0.24, 0.19, 0.14, and 0.25 (N: Newton), respectively.

As can be seen from a comparison of fig. 21 and 22, the eyelash curler 1 of embodiment 2 made of resin for any person achieves a curling pressure (eyelash curling pressure) equal to or higher than that of the metal eyelash curler 9 in fig. 21.

Therefore, the eyelash clip 1 according to embodiment 1 can curl eyelash while performing fine adjustment in substantially the same way as the metal eyelash clip 9 and with the same way of applying force.

< embodiment 2 >

Fig. 23 is a configuration view of an eyelash clip 2 according to embodiment 2 of the present invention. Fig. 24 is an exploded view of an eyelash clip 2 according to embodiment 2 of the present invention.

In the present embodiment, the material and the like are the same as those of the resin used in embodiment 1, but the hinge structure and the like for engagement between the fixing member and the force point member and engagement between the force point member and the acting member are different.

As shown in fig. 23, in the present embodiment, a fitting groove 53, which is a fitting groove (recess) recessed from the lower side of the hinge, is formed in a portion of the force point member 50 slightly distant from the distal end portion.

As shown in fig. 24, the engagement hole 45 formed in the arm 44 of the fixing member 40 is provided with a fulcrum shaft 48 for fitting extending in the width direction.

Then, in a state where the distal end side arm 51 of the force point member 50 is inserted into the engagement hole 45 of the fixed member 40 from the end portion on the distal end side opposite to the hand-held portion 55, the force point member 50 is press-fitted into the fixed member 40 from above to below, and the engagement groove 53 is engaged with the fulcrum shaft 48 in the engagement hole 45, whereby the force point member 50 and the fixed member 40 are coupled.

The force point member 50 is coupled to the fixed member 40 so as to be rotatable about the fulcrum shaft 48 of the fixed member 40 fitted in the fitting groove 53 of the force point member 50 as a 2 nd fulcrum (fulcrum B in fig. 4).

In fig. 24, an example is shown in which the fulcrum shaft 48 extends over the entire width of the engagement hole 45, but the fulcrum shaft 48 that can be fitted into the fitting groove 53 may have a shape with protrusions on both sides that protrude from the inner surface of the engagement hole 45 and interrupt the center.

The action member 60 is provided with a lower pressing portion 61 and link portions 62A and 62B having one ends connected to the lower pressing portion 61. In this configuration, the other ends of the link portions 62A and 62B are bent into a U shape and integrally formed, and a portion connecting the other ends of the link portions 62A and 62B at the other ends is a cylindrical fitting cylinder 63. The fitting cylinder 63 is an engaging portion of the action member 60.

A fitting hook 52 having an upper side recessed is formed at the tip of the force point member 50.

Then, the force point member 50 is press-fitted into the action member 60 from below to above, and the fitting hook 52 engages with the fitting cylinder 63, thereby coupling the force point member 50 and the action member 60. In this way, the engaging hook 52 of the force point member 50 engages with the engaging tube 63 of the acting member 60, so that the acting member 60 can move in conjunction with the force point member 50.

As described above, by coupling the fixing member 40 and the force point member 50 (the 2 nd fulcrum B in fig. 4) and coupling the force point member 50 and the acting member 60 (the 1 st fulcrum a in fig. 4) in a hook shape, it is possible to perform attachment, detachment, and the like without using a shaft portion through which the components penetrate for coupling.

Therefore, the eyelash curler 2 of embodiment 2 can realize the engagement portion of the components completely free of metal without using the pin shafts PS1 and PS2 for connecting the respective members to each other in embodiment 1.

Further, since the engaged state can be released by applying a force in a direction in which the hook is disengaged, the user can disassemble and assemble the hook by his or her hand. For example, when the eyelash clip 2 is dirty, even the small irregularities of the engaging portion can be cleaned by performing the disassembling and cleaning, and then the assembly can be performed.

Further, for example, in the case where a load is suddenly applied to a cosmetic bag or a piece of luggage, the hook is disengaged, so that the damage can be avoided. At this time, since the 1 st fulcrum a and the 2 nd fulcrum B are engaged in opposite directions, when a strong force is applied in one direction, only the engaged state of either the 1 st fulcrum a or the 2 nd fulcrum B is disengaged, and therefore, the engaged state can be easily restored when the engaged state is inadvertently disengaged.

Further, a fitting hook 52 having a concave upper side is provided at the tip end portion of the tip end side arm 51 of the force point member 50, a fitting groove 53 having a concave lower side is formed at a portion of the tip end side arm 51 closer to the tip end portion than the grip portion 55, and the extension portions (2 nd arm portions) 51, 54 extend from the tip end to the grip portion 55 in one piece.

Therefore, in the eyelash curler 2 of the present embodiment, the holding portion can be thickened to the same thickness as the extension portion (arm portion) unlike the metal, and the holding property can be improved compared to the metal, like the embodiment 1.

In the rear end side arm 54 of the force point member 50, an upper surface of a portion closer to the 2 nd hand-held portion 55 than the fitting groove 53 is formed with irregularities in a corrugated shape.

The corrugated uneven shapes 541 and 542 improve the adhesion. In particular, in the case of self-makeup, the thumb is inserted into the finger hole of the hand-held portion 46 on the side of the fixing member 40, and the other fingers are inserted into the finger hole of the hand-held portion 55 on the side of the force point member 50. When the middle finger which is most likely to exert a force is inserted into the finger hole of the hand-held portion 55 or when the ring finger is inserted into the finger hole, the force point member 50 is supported by the index finger or the middle finger by the concave and convex shapes 541 and 542 to stabilize the operation.

Further, a finger hook 56 is provided at the rear end of the hand-held portion 55. For example, when the user curls his or her eyelashes, the middle finger is inserted into the finger hole of the hand-held portion 55 on the force point member 50 side and the ring finger is inserted into the finger hook portion 56, the index finger is inserted into the finger hole of the hand-held portion 55 on the force point member 50 side and the middle finger is inserted into the finger hook portion 56, or the ring finger is inserted into the finger hole of the hand-held portion 55 on the force point member 50 side and the little finger is inserted into the finger hook portion 56.

In this way, even when any one of the fingers is inserted, the force point member 50 is supported by the concave and convex shapes 541 and 542 and the finger hook portion 56 in addition to the finger inserted into the finger hole of the hand-held portion 55, and therefore, when curling eyelashes, the load for 1 finger at the time of pressing is shared, and the operation is stable.

Collision points (hit points) 47 and 57 are provided at portions facing the 1 st hand-held portion 46 of the fixing member 40 and the 2 nd hand-held portion 55 of the force point member 50 when they are closed, respectively.

When the eyelashes are pressed, the front ends of the collision points 47, 57 of the hand-held portions 46, 55 abut against each other, thereby preventing excessive rotation of the force point member with respect to the fixed member.

Since the rotation is restricted by providing the collision points 47 and 57 on the inner side of the grip portion, for example, if the rubber is crushed and thinned due to repeated use, the nipping pressure of the pressing portion at the time of pressing may become insufficient. Therefore, when the collision points 47 and 57 are provided, it is preferable to set the length including the case where the rubber is crushed.

< embodiment 2 and resolution >

((Experimental example 9))

Fig. 25 is a view showing an example of the size of the eyelash clip 2 of embodiment 2. As an example of the configuration, the eyelash curler 2 according to embodiment 2 is designed to have the following dimensions as shown in fig. 25.

The section modulus Z of the stress generation range of the fixing member 40 is 16.88mm³

The stress generation range of the force point member 50, that is, the section modulus Z of the arm portion 54 is 16.875mm³

In the present configuration, since the arm portion 54 has projections and recesses on the outer side for placing a finger, the section modulus corresponds to the section modulus of the thinnest portion.

The arm 51 around the fulcrum B is thicker than the thinnest part on the load point side, and its section modulus Z is 17.63mm³The section modulus Z of the action member 60 is 1.725mm³。

Fig. 26 is a view showing a load position of a measuring mechanism based on a sensor sheet for measuring grip force and pinch pressure by applying a gradually changing load by the apparatus, and a 2 nd testing machine.

In the 2 nd measurement environment shown in fig. 26, a tester different from the 1 st tester was used to measure the gripping force (fig. 27).

In the 2 nd measurement environment, the testing machine is fixed to the eyelash curlers 1 and 9 with the hand-held portion 16 facing downward as shown in fig. 26(b), and a load is applied from the middle of the finger hole of the hand-held portion 25(55, 85).

In addition, when the pinching pressure (fig. 28) is measured, as shown in fig. 26(a), the sensor piece 410 is provided just below the clip rubber R for pinching the eyelashes of the eyelash clips 1(2, 9), and the pinching pressure when a variable load is applied by the 2 nd testing machine at the position shown in fig. 26(b) is measured.

The other end of the sensor sheet 410 is connected to the information processing device 430 via the sensor connector 420. Therefore, the sensor piece 410 provided directly below the jig rubber R in the groove portion of the lower pressurization part 31(61, 91) measures the pressure (sandwiching pressure) with which the lower pressurization part 31 is pressed by the upper pressurization part 11 and the jig rubber R when a variable load is applied by the 2 nd measuring machine, and automatically transmits data to the information processing device 430 via the sensor connector 510. The sensor piece 410 shown in fig. 26(a) is used in the same manner as in the measurement of pinching by a human hand in fig. 21 and 22 described above.

In the 2 nd measurement environment shown in fig. 26, since a load is applied from the middle side of the finger hole of the hand-held portion 25(55, 85) as shown in fig. 26(b), the position to which the load is applied is substantially close to the load point C shown in fig. 4.

From the position of the load, in the 2 nd measurement environment, the gripping force and the curl pressure can be measured by applying a load to the eyelash curler 1(2, 9) in a state closer to the state of being used by a person than the 1 st measurement environment shown in fig. 14.

Fig. 27 is a measurement result of the gripping force (load) applied to the load points of the hand-held portion of the 4 types of eyelash curlers made of metal, according to embodiment 1 made of 6PA + GF 65% resin, embodiment 2 made of 6PA + GF 65% resin, and embodiment 2 made of PAMXD6+ GF 50% resin, in the measurement environment shown in fig. 26. PAMXD6 refers to polyamide MXD 6.

In embodiment 2, in the case of using either one of 6PA + GF 65% resin and PAMXD6+ GF 50% resin, the shape of the eyelash clip 2 of the size example shown in fig. 25 is used.

In the 2 nd measurement environment, as shown in fig. 26(B), when a load is applied to the eyelash clips 1(2, 9) from the inside of the finger hole of the hand-held portion 25(55, 85), the position of the load point C is set to a position 50mm away from the hinge portion (the fulcrum B in fig. 4) for the 4 types of eyelash clips 1(2, 9) to be measured. Thus, the 4 types of eyelash curlers 9, 1, 2 are equal in distance from the fulcrum B to the load point C.

With this setting, it is possible to make almost no variation in the measurement value due to the difference in the distance from the fulcrum B to the load point C caused by the difference in the shape of the eyelash curlers 9, 1, 2.

As shown in fig. 27, when the eyelash clips 1 and 2 according to embodiment 1, embodiment 2 made of 6PA + GF 65% resin, and embodiment 2 made of PAMXD6+ GF 50% resin have substantially the same gripping force but are slightly insufficient for the metallic eyelash clip 9 when the eyelash clips are moved by the same amount of displacement.

Fig. 28 shows the measurement results of the curl pressure of 4 types of eyelash curlers made of metal, according to embodiment 1 composed of 6PA + GF 65% resin, embodiment 2 composed of 6PA + GF 65% resin, and embodiment 2 composed of PAMXD6+ GF 50% resin, measured in the measurement environment shown in fig. 26.

As shown in fig. 28, when the eyelash clips 1 and 2 according to embodiment 1, embodiment 2 made of 6PA + GF 65% resin, and embodiment 2 made of PAMXD6+ GF 50% resin have almost the same clipping pressure as that of the metallic clips, although slightly insufficient, when moved by the same displacement amount.

((Experimental example 10))

The curl pressure of the metallic eyelash curler 9 and the eyelash curler of embodiment 1 composed of 6PA + GF 65% resin was measured in two environments, the environment 1 shown in fig. 17 and the environment 26, and the compatibility of the measurement environments was confirmed.

The correlation is obtained by converting the data of the entrapment pressure measured in the 1 st measurement environment shown in fig. 17 and the data of the entrapment pressure measured in the 2 nd measurement environment shown in fig. 26 to obtain a ratio of the respective measurement values. Fig. 29 is a correlation table thereof.

When data (old measurement value) of the 1 st measurement environment is converted into data (new measurement value) of the 2 nd measurement environment, the old measurement value is multiplied by a value of 0.03% to 0.05% in consideration of an error of the measurement value. This enables conversion of the old measurement value without units into pressure units (MPa) of the new measurement value.

As a result, the data of the 1 st measurement environment shown in fig. 17 and the data of the 2 nd measurement environment shown in fig. 26 are correlated with each other, and the error is small.

When the nip pressure using the sensor sheet 410 in actual use in fig. 21 and 22 is compared with the measured nip pressure using the sensor sheet 410 in fig. 28, the nip pressure in actual use in fig. 21 and 22 is about the same as that in the case of 13mm displacement, which is the maximum value in fig. 28, or is slightly more displaced than that in the case of 13mm displacement. Thus, the eyelash clip 2 of embodiment 1 can achieve a desired clip pressure and lift the eyelashes by being displaced by 13mm or slightly more than 13 mm.

As shown in fig. 28, the eyelash curler 2 according to embodiment 2 generates a curling pressure similar to that of the eyelash curler 1 according to embodiment 1, and therefore, it is expected that the eyelash curler 2 is also at a level similar to that of metal.

As is clear from the above experiment, it is also expected that the eyelash clip 2 of the present embodiment can achieve the same stress by the bending and the clip-winding pressure as those of the metal by using the resin in the recommended range specified by the section modulus and the young's modulus shown in fig. 10. Therefore, the holding property of the hand-held portion can be improved, the strength can be ensured without increasing the size of the hand-held portion compared with the shape made of metal, and the eyelash curling effect equivalent to that made of metal can be exerted by the same operation as that made of metal.

Eyelash clip for local use

In the above-described embodiments 1 and 2, the description has been given on the premise of the entire eyelash clip that clips the entire eyelash close to the entire width of the eye, but the eyelash clip having the material and the sectional shape may be a local eyelash clip according to the present invention.

For example, as shown in fig. 30, the eyelash curler 3 for partial use may have a configuration similar to that of the above-described embodiment 1 or 2, and may have a configuration in which the width of the upper pressing portion 11P or the lower pressing portion 31P for curling eyelashes is short. Therefore, the interval between the column parts 12C, 13C, 12D, 13D of the fixing member 10P and the interval between the link parts 32C, 32D of the acting member 30P are also narrower than those in embodiment 1.

Alternatively, as shown in fig. 31, a forceps type eyelash clip 4 for local use may be used.

By using the resin in the recommended range defined by the section modulus and the young's modulus shown in fig. 10 in the local eyelash curlers 3 and 4, the same stress can be achieved by the bending and curling pressure equivalent to that of the metal, and therefore, the eyelash curling effect equivalent to that of the metal can be exhibited.

Since the local eyelash curlers 3 and 4 shown in fig. 30 require a smaller force than the global eyelash curlers, the section modulus for defining the thickness may be slightly smaller than the recommended range if the material satisfies the young's modulus of the recommended range.

< cosmetic tool 1 (tweezers) >)

In the above description, an eyelash clip is described as an example of the makeup tool, but the makeup tool to which the present resin can be applied is not limited to the eyelash clip.

For example, as an example of a cosmetic tool that may be made of resin, tweezers 5 may be used as shown in fig. 32. The forceps are used for beauty, for example, for removing hairs (human hairs) such as human hair, eyebrows, nose hairs, and body hairs, or animal hairs.

In the present forceps, by using a resin in the recommended range defined by the section modulus and young's modulus shown in fig. 10, it is possible to achieve the same stress by the bending and pinching pressure equivalent to that of metal, and therefore, the epilation effect equivalent to that of metal can be exhibited.

< cosmetic props 2 (Scissors) >

As another example of the makeup tool that can be made of resin, a pair of beauty scissors may be used as shown in fig. 33.

The pair of cosmetic scissors 6 is used to cut off hairs such as human hair, eyebrows, nose hairs, and body hairs, or animal hairs. The cosmetic tool made of resin may be a razor, a nail clipper, or the like.

In the present scissors, by using a resin within the recommended range defined by the section modulus and young's modulus shown in fig. 10, the same stress can be achieved by bending the same as that of metal, and therefore, the same holding feeling and shearing feeling as those of metal can be exhibited by bending the same as that of metal.

While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the specific embodiments described above, and various modifications and changes can be made within the scope of the gist of the embodiments of the present invention described in the claims.

The application takes the Japanese invention patent application No. 2018-174219 filed by the patent office on 9/18.2018 as the basis of priority requirements, and the application cites the whole content of the Japanese invention patent application No. 2018-174219.

Description of the symbols

1. 2 eyelash curler

3. 4 eyelash curler for local use

5 tweezers

6 Scissors for beauty

10 fixing element

11 upper side pressing part

12(12A, 12B) Upper side column part (column part)

13(13A, 13B) Branch column part (column part)

14 arm (1 st arm)

15 engaging hole portion

151A, 151B small holes

16 hand-held part

20 force point component

21 front end side arm (arm, 2 nd arm)

22 front end side engaging hole (1 st engaging hole)

23 nd 2 nd engaging hole

24 rear end side arm (arm, 2 nd arm)

25 hand-held part

30 function parts

31 lower pressing part (abutting part, upper clamping piece)

311A, 311B hook (engaging part)

32A, 32B link part

33 connecting part

331A, 331A aperture

400 fixing part

41 upper pressurizing part

42(12A, 12B) upper side column part (column part)

43(13A, 13B) Branch column part (column part)

44 arm

45 engaging hole portion

46 hand-held part

47 collision point

48 fulcrum shaft

50 force point component

51 front end side arm (arm)

Hook for 52 fitting (connecting part)

53 fitting groove (fitting part, coupling part)

54 rear end side arm (arm)

55 hand-held part

56 finger hook

57 point of impact

60 acting part

61 lower pressing part (abutting part, upper pressing piece)

611A, 611B engaging hook (engaging part)

A fulcrum

B fulcrum

Point of C load

PS1 Pin

PS2 Pin

R clamp rubber

Claims (10)

1. A cosmetic prop comprises Young's modulus of 2500N/mm²～40000N/mm²And at least the maximum stress generation portion is formed to have a section modulus of 5mm³～40mm³。

2. The cosmetic prop of claim 1,

the resin material is a fiber-reinforced resin containing Glass Fibers (GF).

3. The cosmetic prop of claim 2,

the fiber-reinforced resin contains Carbon Fibers (CF).

4. A cosmetic prop according to claim 2 or 3,

the resin contained in the fiber-reinforced resin is any one of or two or more of Polyamide (PA), polyether ether ketone (PEEK), polyethylene terephthalate (PETG), glycol-modified Pet (PETG), polyphenylene sulfide (PPS), and polyamide MXD 6.

5. The cosmetic prop according to any one of claims 2 to 4, wherein,

the Glass Fiber (GF) is blended in an amount of 30 to 65 mass% in the fiber-reinforced resin.

6. The cosmetic prop of claim 1,

the resin material is a resin containing any one of nylon 6/10, polyamide MXD6, polyether ether ketone (PEEK), polyethylene terephthalate (PETG), glycol-modified Pet (PETG), or polyphenylene sulfide (PPS).

7. The cosmetic prop according to any one of claims 1 to 6, wherein,

the makeup tool is an eyelash clip that curls eyelashes.

8. The cosmetic prop according to any one of claims 1 to 7, wherein,

the cosmetic prop is a tweezer for clamping human hair.

9. The cosmetic prop according to any one of claims 1 to 7, wherein,

the cosmetic prop is a scissors, razor, or nail clipper.

10. An eyelash clip which is the cosmetic prop according to claim 7, comprising:

a fixing member having an upper pressing portion integrally formed thereon;

an acting member capable of moving the lower pressurizing part up and down with respect to the upper pressurizing part; and

a force point member that moves the acting member up and down by rotating with a part of the fixing member as a fulcrum,

wherein the fixing member, the acting member, and the force point member are integrally formed of resin,

the maximum stress generating portion is formed at the fixing member and the force point member.

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